2 tips.
Rome, Case Romane's location
You have to go to southern Rome and in Piazza di SS Gioavnni e Paolo, beneath the church with the same name are the…Catacombs of Santa Priscilla, Rome.... not spectacular, but worth a visit
On Via Salaria 272 there is something you could visit but I don't guarantee you will like it. It's called Catacombs of…